Jawabanmu

2014-04-04T16:22:33+07:00
2014-04-04T16:27:58+07:00
I) 2,4,6,8,10,12,14,16,18 mediannya 10
   Rata-rata = 2+4+6+8+10+12+14+16+18  per 9
                  = 90 per 9
                  =10

sama kan sama mediannya :D
Ngerti ga?